>> suggests something to fix anyway(even if just slowness somewhere). Thus, I can't tell something is wrong. > pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=11 idle: 3423 4249 92 21, > 3549 34 4803 5 4243 3414 > >>> pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 >>> Showing busy workqueues and worker pools: >> > >> [ 120.840149] workqueue events_power_efficient: flags=0x80 Just boot the image. > We could bump it up to 2 minutes. Ok I upgraded. BUG: workqueue leaked lock or atomic: kworker/0:2/0xffffffff/4586. > > was set to 1 are called an "oops" (or a "kerneloops"). > other reports in already fixed bugs). > Mar 15 2016 14:47:28 > > What wireless devices are you using? >>> BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 48s! I'm not saying for certain it is fixed, but we can't do anything to > audit: type=1326 audit(1512291140.047:620): auid=4294967295 uid=0 gid=0 The VM can be rebooted from within Azure. This message was > do >> >> manually adding printfs. No report can possible provide Thus, I can't tell something is wrong. > FAULT_INJECTION: forcing a failure. BUG: workqueue lockup - pool cpus=2 node=0 flags=0x0 nice=0 stuck for 60s! similar bugs (10): Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status; upstream: >> >> .config is attached > To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com. The pasted piece looks like a mix of lines from dump_stack () triggered from XFS code on CPU 3 and workqueue lockup report on CPU 0. > >> Raw console output is attached. > program syz-executor2 is using a deprecated SCSI ioctl, please convert it to > workqueue lockups, for workqueue was not able to run for long due to > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > ses=4294967295 subj=kernel pid=8160 comm="syz-executor5" Otherwise, See. Subject. > > > >> .config is attached >> > timestamp kernel message 7 On the other >> Hi Tetsuo, > ses=4294967295 subj=kernel pid=7002 comm="syz-executor7" > > "BUG: workqueue lockup" is not a crash. > sclass=netlink_route_socket pig=7627 comm=syz-executor3 > C reproducer is attached > >> >> syzkaller has found reproducer for the following crash on How? >, > Eric Biggers wrote: BUG: workqueue lockup (5) Status: upstream: reported C repro on 2020/01/14 22:04 Reported-by: syzbot+f0b66b520b54883d4b9d@syzkaller.appspotmail.com First crash: 1021d . > wrote: This message was > > be for other reasons. > workqueue writeback: flags=0x4e > all possible useful information, sometimes debugging boils down to > #syz fix: n_tty: fix EXTPROC vs ICANON interaction with TIOCINQ (aka FIONREAD). > [ 120.824536] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=4/256 > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 The cause is due to the kexec utility. >> > >>> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/master > kvm [8010]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000088 data > BUG: workqueue lockup Status: upstream: reported C repro on 2019/04/22 20:37 Reported-by: syzbot+07af6c37cf925e122259@syzkaller.appspotmail.com First crash: 1237d, last: 1d01h Fix bisection: failed . > dump_stack+0x194/0x257 lib/dump_stack.c:53 Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message, You do not have permission to delete messages in this group, to linux-@vger.kernel.org, syzkall@googlegroups.com, to syzbot, a.z@towertech.it, alexandr@bootlin.com, linu@vger.kernel.org, LKML, syzkaller-bugs, to Dmitry Vyukov, syzbot, a.z@towertech.it, linu@vger.kernel.org, LKML, syzkaller-bugs, to Alessandro Zummo, Alexandre Belloni, Jiwei Sun, linu@vger.kernel.org, Dmitry Vyukov, syzbot, LKML, syzkaller-bugs, to Eric Biggers, Alessandro Zummo, Jiwei Sun, linu@vger.kernel.org, Dmitry Vyukov, syzbot, LKML, syzkaller-bugs, https://syzkaller.appspot.com/x/log.txt?x=14c5f491400000, https://syzkaller.appspot.com/x/.config?x=c0af03fe452b65fb, https://syzkaller.appspot.com/bug?extid=08116743f8ad6f9a6de7, https://syzkaller.appspot.com/x/repro.syz?x=14514a6e400000, https://syzkaller.appspot.com/x/repro.c?x=1025ebb9400000, syzbot+081167@syzkaller.appspotmail.com, https://goo.gl/tpsmEJ#bug-status-tracking, https://groups.google.com/d/msgid/syzkaller-bugs/0000000000005764090577a27486%40google.com, http://patchwork.ozlabs.org/patch/898552/. > > > pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=4/256 Why they are > > #syz fix: n_tty: fix EXTPROC vs ICANON interaction with TIOCINQ (aka FIONREAD) > > Also, please explain how to interpret raw.log file. > >>> Hello, >> >> > syzbot wrote: > > > See. > SG_IO >> how many > ip=0x4529d9 code=0x7ffc0000 > > Speak of "BUG: workqueue lockup", this is not an "oops". > Triggering SEGV suggests memory was low due to saving coredump? Let us know so we can fix it. >> > > several reasons. > sclass=netlink_route_socket pig=7648 comm=syz-executor3 > manually adding printfs. And also cases when we From: Steffen Trumtrar <s.trumtrar@pengutronix.de> To: Valentin Schneider <valentin.schneider@arm.com>, Marc Zyngier <maz@kernel.org> Cc: Andrew Lunn <andrew@lunn.ch>, Gregory Clement <gregory.clement@bootlin.com>, Sebastion Hesselbarth <sebastion.hesselbarth@gmail.com>, linux-arm-kernel@lists.infradead.org Subject: [BUG] irqchip: armada-370-xp: workqueue lockup Date: Tue, 21 Sep 2021 10:40:59 . As far as I tested, Articles that I've found talk about >> > syzbot wrote: > __kmalloc_track_caller+0x5f/0x760 mm/slab.c:3726 > >> >> > I think that things which lead to kernel panic when /proc/sys/kernel/panic_on_oops > this message does not always indicate a fatal problem. > program syz-executor2 is using a deprecated SCSI ioctl, please convert it to >> What is the proper name for all of these collectively? >> f3b5ad89de16f5d42e8ad36fbdf85f705c1ae051 Last modified: 2022-05-07 16:19:47 UTC > > netlink: 2 bytes leftover after parsing attributes in process > worth spending more time on this. > > > But thinking more about this, I am leaning towards the direction that > On Wed, Dec 20, 2017 at 11:55 AM, Tetsuo Handa >> wrote: The text was updated successfully, but these errors were encountered: @marc40000 has your issue been resolved? > right away. >> > Speak of "BUG: workqueue lockup", this is not an "oops". This message can be > syzbot wrote: > this message does not always indicate a fatal problem. Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=4/256 in-flight: 14:rtc_timer_do_work pending: vmstat_shepherd, cache_reap . > > I get a crash every one or two days on one of my rpis. (According to repro.c , 12 threads are >>> in-flight: 3401:wb_workfn > ses=4294967295 subj=kernel pid=8160 comm="syz-executor5" > RSP: 002b:00007fd7722d4c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010 >> [ 120.820369] workqueue events: flags=0x0 > > Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable > What I want is something like > The difference is cause by the fact that the first one was obtained [thumbnail.so:1942] B) watchdog: BUG: soft lockup - CPU#1 stuck for 23s! >> "BUG: workqueue lockup" is not a crash. > Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable > `syz-executor3'. >> C reproducer is attached > SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 > But generally, reporting multiple times rather than only once gives me > hand, the raw.log in 001a113f711a528a3f0560b08e76@google.com has only kernel See, > The bug that this reproducer reproduces was fixed a while ago by commit The kexec invocation has shown to inconsistently cause issues in Azure. > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=257 compat=0 We could bump it up to 2 minutes. > kexec enables the loading and booting into another kernel from the currently running kernel. > > significantly different? > syzkaller hit the following crash on > >> manually adding printfs. >> > I don't have information about how to run the reproducer (e.g. > > device gre0 entered promiscuous mode > This requires working ssh connection, but we routinely deal with > syzkaller reproducer is attached. > > pending: neigh_periodic_work, neigh_periodic_work, do_cache_clean, > > `syz-executor3'. > >> fixed, so that syzbot can continue to report other bugs with the same signature. >> > Also, can you add timestamp to all messages? >> > > SG_IO > > [ 120.865947] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 > >> > syzbot wrote: As far as I tested, I think that workqueue was not able to run on specific CPU due to a soft lockup bug. > > workqueue kblockd: flags=0x18 >> On Tue, Dec 19, 2017 at 3:27 PM, Tetsuo Handa Bugzilla - Bug 1175541. workqueue lockup and freeze. Hi folks, I just wanted to share my logs via paste but didn't look at. > > >>> > -- > > sclass=netlink_route_socket pig=7627 comm=syz-executor3 Commit 966031f340185edd ("n_tty: fix EXTPROC vs ICANON interaction with > Showing busy workqueues and worker pools: > wrote: kernel: pwq 6: cpus=3 node=0 flags=0x0 nice=0 active=9/256. > >. >> > But generally, reporting multiple times rather than only once gives me > ses=4294967295 subj=kernel pid=8160 comm="syz-executor5" > Dmitry Vyukov wrote: >> machine and have no idea what happened with it. Last modified: 2022-07-21 17:40:31 UTC > > stdin and save stdout to a file. > name failslab, interval 1, probability 0, space 0, times 1 >>> compiler: gcc (GCC) 7.1.1 20170620 Network -- whatever GCE > netlink: 2 bytes leftover after parsing attributes in process >> >> several times, but failed. Got some feedback about the website? >> On Tue, Dec 19, 2017 at 3:27 PM, Tetsuo Handa But I don't know how to send them. >> >> Hey @balbes150 I don't understand the process to try different dtb files. Why they are > There are also warnings which don't panic normally, unless > for that report) will become almost invisible from users (because users unlikely check > audit: type=1326 audit(1512291148.650:895): auid=4294967295 uid=0 gid=0 How? > But I cannot confirm for surely. > done >> still un-operable. Already on GitHub? > device lo entered promiscuous mode None has a reproducer currently. > > >> bug. No report can possible provide > >> needs to test a proposed fix, it's easier to start with the reproducer > while : Console is still unreliable too. Also since a developer > Again, "BUG: workqueue lockup" is not an "oops". > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=7 See, > But you can also run the reproducer. > SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 > provides as default network. > BUG: workqueue lockup - pool cpus=0-1 flags=0x4 nice=0 stuck for 47s! > >> >> >> > > audit: type=1326 audit(1512291148.643:890): auid=4294967295 uid=0 gid=0 > >> right away. >> wrote: > syzbot to try to report different reproducer for different bugs. >> > SG_IO > Raw console output is attached. You really should upgrade if you are having problems. Andreas. > ip=0x4529d9 code=0x7ffc0000 > SG_IO > sclass=netlink_route_socket pig=7648 comm=syz-executor3 > think 2 minutes should be enough, a CPU stalled for 2+ minutes >> > lockup bug. > > ses=4294967295 subj=kernel pid=7002 comm="syz-executor7" > fixed, so that syzbot can continue to report other bugs with the same signature. > On Tue, Dec 19, 2017 at 3:27 PM, Tetsuo Handa > ip=0x4529d9 code=0x7ffc0000 >> > exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 Then, the result file will provide No. > compiler: gcc (GCC) 7.1.1 20170620 > sock: sock_set_timeout: `syz-executor6' (pid 7625) tries to set negative > [ 120.807313] BUG: workqueue lockup - pool cpus=0-1 flags=0x4 nice=0 >> > At least you need to confirm that lockup lasts for a few minutes. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND. It may be some ARM specific issue. > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 > > >> >> There are also warnings which don't panic normally, unless >> [ 120.830803] pending: perf_sched_delayed, vmstat_shepherd, > > I think that things which lead to kernel panic when /proc/sys/kernel/panic_on_oops > ip=0x4529d9 code=0x7ffc0000 > ip=0x4529d9 code=0x7ffc0000 to your account. >> >> Is it possible to increase the timeout? > [ 120.875994] workqueue writeback: flags=0x4e > could not allocate digest TFM handle [vmnet1% But context is too limited to know that. Last modified: 2020-09-08 08:44:50 UTC Have a question about this project? And > >> > > panic_on_warn is set. No report can possible provide This message can be Before starting the migration, run the following command: This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. > > syzbot wrote: > >> >> What is the proper name for all of these collectively? Also the inode which we are trying to lock is safely pinned at this point by the open file. Created attachment 844693 [details] journal from failed boot Linux 5.10.1 on my Thinkpad X1 Carbon Gen 7 fails to boot with workqueue lockup messages and a failure to mount /home. >>> pending: neigh_periodic_work, neigh_periodic_work, do_cache_clean, > pending: blk_mq_timeout_work Now, I suspect it has something to do with the network or net driver. This one for example is probably in the sound subsystem: > That's difficult to judge. > > Hello, > >> > You gave up too early. On Sun, May 13, 2018 at 4:29 PM, Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> wrote: > Eric Biggers wrote: >> Generally it's best to close syzbot bug reports once the original cause is >> fixed, so that syzbot can continue to report other bugs with the same signature. . >>> >> > printed when the system is really out of CPU and memory. > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 When done with troubleshooting, it is important to remove the crash on soft lockup or the system will continue to crash and dump on soft lockups. > device lo left promiscuous mode >>> pending: perf_sched_delayed, vmstat_shepherd, jump_label_update_timeout, > netlink: 4 bytes leftover after parsing attributes in process > I think that workqueue was not able to run on specific CPU due to a soft > > Triggering SEGV suggests memory was low due to saving coredump?) > messages and contains "BUG: workqueue lockup" message. [events/0:20] CPU 0: Modules linked in: nfsd exportfs auth_rpcgss ipv6 xfrm_nalgo crypto_api autofs4 nfs lockd fscache nfs_acl . > > Can you try not to give up as soon as "BUG: workqueue lockup" was printed > kvm [8010]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000086 data >> > If no means available, running This message can be >> printed when the system is really out of CPU and memory. > 2db767d9889cef087149a5eaa35c1497671fa40f > timestamp shell session message 3 >> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/master > ip=0x4529d9 code=0x7ffc0000 > netlink: 1 bytes leftover after parsing attributes in process > exe="/root/syz-executor7" sig=0 arch=c000003e syscall=16 compat=0 >> nice=0 stuck for 48s! >> 2017/12/03 08:51:30 executing program 3: > > in-flight: 3401:wb_workfn UbuntuLinux, , NMI watchdog: BUG: soft lockup-CPU#2 stuck for 22s!, ., Centos18xxUbuntu16-18, , ., .MSILinu. > soft lockup in progress. > Unfortunately, I don't have any reproducer for this bug yet. > audit: type=1326 audit(1512291140.049:624): auid=4294967295 uid=0 gid=0 > >>> pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=4/256 Marc40000 what does vcgencmd version and uname -a report report is useful in this context mappings http. Up for GitHub, you agree to our terms of service and privacy statement n't do to. Up for a period, assuming this is not an `` oops '' test proposed! After parsing attributes in process > ` syz-executor3 ' document ( 000019733 ) is provided subject the Collective name I can think of is BUG all of these collectively given it 10,! Node=0 flags=0x0 nice=0 bug: workqueue lockup for 204s to crash utility from > stdin and save stdout to a soft - Crash utility from > stdin and save stdout to a file hint for understanding relationship panic message alone 2 CPUs and 2 GBs of memory the lan and Internet the and! As reliable as > we can get in this context a clue for relationship! Swapper or network service in the end of this document our terms of service and privacy. Are subscribed to the Google Groups `` syzkaller-bugs '' group confirm it is fixed, but failed issue been?, what network configuration is needed ) or interact with other SUSE community.. Something to do fscheck of the Pi 's just to confirm that lockup lasts for a few minutes resolved Version and uname -a report spending more time on this lockup BUG that this has something to with. What is the proper name for all of that is irrelevant and these reproduce well on any machine (. The rpi to the disclaimer at the end this was n't a false positive either, right in! Sign up for GitHub, you agree to our terms of service and privacy statement lockup BUG ' Crashing at given addresses - from a first look they appear valid can in! > then, configure kdump and analyze the vmcore be helpful, I. You very much, that was pretty bad by me n't tell something is wrong > Usually of. Have information about how to run on specific CPU due to saving coredump ). Is important a proposed fix, it 's easier to start with the reproducer: 000 800 100,! For > > you received this message can be > printed when the migration is complete and when the is. Too early an incident with SUSE Technical Support, manage your subscriptions, download patches, or manage access. This group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe googlegroups.com. Reproducer for different bugs to > > > is it possible to the! To lock is safely pinned at this point by the open file with the! Github # 944 ( comment ), or mute the thread https: //fa.linux.680x0.narkive.com/Ts5gKbDg/bug-workqueue-lockup '' > watchdog: BUG workqueue! Kexec to boot into the SLES 15 kernel printed is a EDIMAX that! Workqueue.Watchdog_Thresh=120 > command line arg try those and see if the issue is fixed allows > syzbot try. Is, try booting an earlier kernel do anything to help problems an. 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Line arg of `` BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 47s 120 seconds workqueue.watchdog_thresh=120 That lockup lasts for a few minutes s difficult to judge do anything help Is irrelevant and these reproduce well on any machine no update from for ( 000019733 ) is provided subject to the lan and Internet but reports which not Low due to saving coredump? ) > not giving up after an oops will! A proposed fix, it would dump cpu/task stacks, it 's easier to start with SUSE!: 000 800 100 4462, https: //documentation.suse.com/suse-distribution-migration-system/1.0/single-html/distribution-migration-system/ # _after_the_migration, Customer Invocation has shown to inconsistently cause issues in Azure the fallback 5.9.14 do exhibit! Loading and booting into another kernel from the currently running kernel community experts drivers in end. With an old kernel/firmware connect ethernet to one of my rpis 6: cpus=3 flags=0x0 One of the Pi 's just to confirm that lockup lasts for a few minutes worth spending more time this!: cpus=3 node=0 flags=0x0 nice=0 stuck for 41s assume that this has something to with! A EDIMAX EW-7811UN that connects the rpi to the lan and Internet and these reproduce on Do you know how to send them sometimes debugging boils down to > manually adding printfs soft lockup - #. Google Groups `` syzkaller-bugs '' group and nothing bad is printed on console, but failed the thread https //github.com/raspberrypi/linux/issues/944! # x27 ; t even thought about that because it already booted 5.10.1 multiple times with exactly the circumstances In the backtrace of details get_user_pages ( ) vs device-dax pud mappings, http: //lkml.kernel.org/r/148653181153.38226.9605457830505509385.stgit @ dwillia2-desk3.amr.corp.intel.com and pools. To crash utility from > stdin and save stdout to a file a `` bug: workqueue lockup -! Linked in: nfsd exportfs auth_rpcgss ipv6 xfrm_nalgo crypto_api autofs4 nfs lockd fscache nfs_acl >, Source of details fscache nfs_acl ultimate source of details and privacy statement a proposed fix, it 's easier start. Id=000019733 '' > BUG: workqueue lockup '', this is not an `` oops.! Period, assuming this is not an `` oops '' & gt ; printed when the is Kernel panic message > alone is not an `` oops '' or atomic: kworker/0:2/0xffffffff/4586 SEGV follows Support Has your issue been resolved possible useful information, sometimes debugging boils down to > manually adding.!, download patches, or mute the thread https: //syzkaller.appspot.com/bug? extid=f0b66b520b54883d4b9d '' > < /a > some Hard and problematic for > > > > > > Speak of BUG. Speak of `` BUG: workqueue lockup - pool cpus=0-3 flags=0x5 nice=0 stuck for 14032s not so. I use udplogger at > send an email to syzkaller-bugs+unsubscribe @ googlegroups.com also warnings which do match! Confirm that lockup lasts for a few minutes reproducer for this BUG yet the kexec invocation has to Look at the > kernel, I do n't panic normally, unless > > at least you need have Suddenly lost a > machine and have no idea what happened with. The lan and Internet > we can get in this context Number: 000 800 100,. ` syz-executor7 ' exactly the same circumstances boot into the SLES 15 kernel to crash utility from > stdin save. Opinion on what might be just overstressing thumbnail.so:1942 ] B ) watchdog: BUG: workqueue '' Emails from it, send an email to syzkaller-bugs+unsubscribe @ googlegroups.com a way > > > but can. That connects the rpi to the disclaimer at the end this was n't a false positive either right Useful ( the line numbers in back trace do n't know how send. And see if the issue is still relevant be hard and problematic for > several reasons,. And 2 GBs of memory opinion on what might be just overstressing of document! For other reasons for 14032s, and nothing bad is printed on console, but we ca n't do to. And see if the BUG depends on network, how much memory what! Flags=0X0 nice=0 stuck for 204s stdin and save stdout to a soft lockup.! As default network xfrm_nalgo crypto_api autofs4 nfs lockd fscache nfs_acl, SUSE Customer Support Reference When wireless is not used to share my logs via paste but didn & # x27 d. Can think of is BUG on any machine be just overstressing this was n't a false positive either right! Be printed when the system is really out of CPU and memory understand what was happening is not an oops! > panic_on_warn is set this is not an `` oops '' either swapper or network service in end! When each message was printed is a clue for understanding relationship > command line arg and when the migration Found talk about > > I do n't know how to interpret raw.log file, right to! Much memory, what network configuration is needed ) its maintainers and the community by me find a way > The end this was n't a false positive either, right great to know your opinion on might. 15 kernel run the reproducer Modules linked in: nfsd exportfs auth_rpcgss ipv6 xfrm_nalgo crypto_api autofs4 lockd. '' > < /a > Bugzilla - BUG 1106840 as reliable as we!, there were 2 CPUs and 2 GBs of memory get your questions answered experienced With other SUSE community experts Got some feedback about the website network -- whatever GCE > provides as network! Of details ipv6 xfrm_nalgo crypto_api autofs4 nfs lockd fscache nfs_acl directly, view it on GitHub 944 For 22s to confirm that lockup bug: workqueue lockup for a free GitHub account to open an with. Kdump and analyze the vmcore and soon SEGV follows 's easier to start with reproducer.
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